My daughter got an Iphone 5S and we are incurring data usages when we are logged into WIFI, even in the middle of the night. I think we shut all of the notifications off, but it keeps happening. We are using TONS more data and incurring overages from her previous phone. How can we be using data when we are connected to WIFI???? Any hints? I can't get through to Customer Service for help!
The devices will still use a small amount of cellular data. On both my iPhone's 5s this also happens. I have cellular data and roaming off. But it is such a small amount. a few kilobytes.